Results 121 to 130 of about 1,656,273 (329)

Dielectric Barrier Discharge Plasma Deoxidation of Natively Oxide Layer of Copper Powders in a Fluidized Bed

Advanced Engineering Materials, EarlyView.
This paper presents a novel approach to reducing oxide layers on metal powders using low‐temperature hydrogen dielectric barrier discharge plasmas at atmospheric pressure. Unlike conventional hydrogen‐plasma reductions, the powders do not contact the plasma directly.
Shukang Zhang, Annett Wollmann, Thomas Gimpel, Alfred P. Weber   +3 more
wiley   +1 more source

Density response of holographic metallic IR fixed points with translational pseudo-spontaneous symmetry breaking

Journal of High Energy Physics, 2019
The density response of charged liquids contains a collective excitation known as the plasmon. In holographic systems with translational invariance the origin of this collective excitation is traced back to the presence of zero-sound. Using a holographic
Aurelio Romero-Bermúdez
doaj   +1 more source

Symmetric and asymmetric excitations of a strong-leg quantum spin ladder

, 2013
The zero-field excitation spectrum of the strong-leg spin ladder (C$_7$H$_10$N)$_2$CuBr$_4$ (DIMPY) is studied with a neutron time-of-flight technique. The spectrum is decomposed into its symmetric and asymmetric parts with respect to the rung momentum ...
Bouillot, P., Ehlers, G., Giamarchi, T., Kollath, C., Mühlbauer, S., Schmidiger, D., Tsvelik, A. M., Zheludev, A.   +7 more
core   +2 more sources

Incorporation of Selenium into Sol–Gel‐Derived Bioactive Glass: Influence on Glass Structure, Bioactivity, and its Selective Cytotoxicity

Advanced Engineering Materials, EarlyView.
Selenium was incorporated into a sol–gel‐derived bioactive glass to enable sustained therapeutic ion release. The selenium‐containing glass preserved bioactivity while selectively inducing cytotoxicity in osteosarcoma cells and maintaining osteoblastic viability.
Breno Rocha Barrioni, Thalita Marcolan Valverde, Talita Martins, Guilherme Mattos Jardim Costa, Alfredo Miranda de Goes, Marcello Rosa Dumont, Eduardo Henrique Martins Nunes, Marivalda de Magalhães Pereira   +7 more
wiley   +1 more source

Maximum entropy method for estimation of response distribution of nonlinear systems subjected to non-white random excitation

Nihon Kikai Gakkai ronbunshu, 2016
The approximate analytical method using the maximum entropy method (MEM) is proposed to estimate the stationary probability density function of nonlinear systems subjected to non-white random excitation.
Shimpei KANAMORI, Takahiro TSUCHIDA, Koji KIMURA   +2 more
doaj   +1 more source

Vortex rectification effects in films with periodic asymmetric pinning

, 2005
We study the transport of vortices excited by an ac current in an Al film with an array of nanoengineered asymmetric antidots. The vortex response to the ac current is investigated by detailed measurements of the voltage output as a function of ac ...
Morelle, M., Moshchalkov, V. V., Silva, C. C. de Souza, Van de Vondel, J., Zhu, B. Y.   +4 more
core   +1 more source

Catalytic, Asymmetric Alkylation via Excited-State Iminium Ions [PDF]

Chem, 2017
The catalytic, enantioselective β-alkylation of unsaturated carbonyls is a powerful strategy for selectively installing stereocenters vicinal to carbonyls, yet it remains surprisingly elusive. In a recent publication in Nature Chemistry , Melchiorre and co-workers have introduced an elegantly simple solution that addresses this challenge by developing
openaire   +1 more source

Biodegradable and Recyclable Luminescent Mixed‐Matrix‐Membranes, Hydrogels, and Cryogels based on Nanoscale Metal‐Organic Frameworks and Biopolymers

Advanced Functional Materials, EarlyView.
The study presents biodegradable and recyclable mixed‐matrix membranes (MMMs), hydrogels, and cryogels using luminescent nanoscale metal‐organic frameworks (nMOFs) and biopolymers. These bio‐nMOF‐MMMs combine europium‐based nMOFs as probes for the status of the materials with the biopolymers agar and gelatine and present alternatives to conventional ...
Moritz Maxeiner, Julian Burkhart, Kateryna Borysova, Chiara Mazzariol, Klaus Müller‐Buschbaum   +4 more
wiley   +1 more source

Mode conversion by symmetry breaking of propagating spin waves

, 2011
We study spin-wave transport in a microstructured Ni81Fe19 waveguide exhibiting broken translational symmetry. We observe the conversion of a beam profile composed of symmetric spin-wave width modes with odd numbers of antinodes n=1,3,...
Clausen, P., Hillebrands, B., Leven, B., Obry, B., Pirro, P., Schultheiss, H., Schäfer, S., Vogt, K., Wolf, G.   +8 more
core   +1 more source

Tuning the Dielectric Properties of Individual Clay Nanosheets by Interlayer Composition: Toward Nano‐Electret Materials

Advanced Functional Materials, EarlyView.
The dielectric properties of clays are studied on the level of individual monolayers and functional double stacks. The material breakdown characteristics and charge storage performance are analyzed. For illustration, a defined charge pattern representing a cuneiform character is produced, written into a microscopic clay tile, referencing the origins of
Sebastian Gödrich, Paul Markus, Matthias Stöter, Bernhard Biersack, Rainer Schobert, Josef Breu, Georg Papastavrou   +6 more
wiley   +1 more source